Technical data

52 4000 X-Series Oscilloscopes Advanced Training Guide
3 Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs
You should now see on your scope’s display a digital burst waveform
consisting of six pulses of various widths, followed by an infrequent glitch
similar to Figure 29. Using the scope’s default Edge triggering mode, the
scope usually triggers on the 1st pulse of this burst. Let’s now set up the
scope to trigger on the 3rd pulse in this burst using the “Nth Edge Burst”
triggering mode.
9 Press the [Trigger] front panel key; then tap Nth Edge Burst using the
Trigger Type menu.
10 Tap the Idle softkey; then set the minimum signal idle time to 2.00 µs.
11 Tap the Edge softkey; then set the edge count to 3.
Your scope should now be triggering on the 3rd rising edge in this burst
as shown in Figure 30. Note that the idle time setting of 2.00 µs defines
when a burst ends and begins. This setting must be set to a value that is
greater that the longest legitimate pulse width within the burst, but less
than signal idle time between each occurrence of the burst. To trigger on
other edges within this burst, vary the Edge count setting between 1 and
7.
Figure 30 Triggering on the 3rd pulse in the burst using the “Nth Edge Burst” triggering
mode.